MESON Chess Problem Database

Problem Display
PID: 120037 (3k3n/p1rBp3/P1p5/2N2N2/3P2p1/5PQb/6p1/6K1 w - - 0 1)

Kaiser, Karl

Deutsche Schachzeitung, 1915

3k3n/p1rBp3/P1p5/2N2N2/3P2p1/5PQb/6p1/6K1

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd7
      • 2.Qb8#
    • 1...gxf3
      • 2.Qg8#
    • 1...e5
      • 2.Qh4#
    • 1...e6
      • 2.Qh4#
  • Tries
    • 1.Sg7?
      • threat
        • 2.Sge6#
      • 1...Rxd7
        • 2.Qb8#
      • 1...e5
        • 2.Qh4#
      • 1...e6
        • 2.Qh4#
      • 1...gxf3!
    • 1.Qd6?
      • threat
        • 2.Se6#
        • 2.Qxe7#
      • 1...Rxd7
        • 2.Qb8#
        • 2.Qxd7#
      • 1...Rb7
        • 2.Se6#
        • 2.Sxb7#
      • 1...Rc8
        • 2.Se6#
        • 2.Sb7#
      • 1...Sg6
        • 2.Se6#
      • 1...e5
        • 2.Se6#
        • 2.Qe7#
        • 2.Qf8#
        • 2.Qf6#
      • 1...e6
        • 2.Sxe6#
        • 2.Qe7#
        • 2.Qf8#
      • 1...exd6!
  • Keys
    • 1.Sd6!
      • 1...Rxd7
        • 2.Se6#
      • 1...gxf3
        • 2.Qg8#
      • 1...exd6
        • 2.Qh4#
      • 1...Rb7
        • 2.Sdxb7#
      • 1...Rc8
        • 2.Sdb7#
      • 1...e5
        • 2.Qh4#
      • 1...e6
        • 2.Qh4#
      • 1...Sg6
        • 2.Sf7#
      • 1...Sf7
        • 2.Sxf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(f);OGATE,XB(H)::QAR2(C)
    • P(c);OGATE,XP(B)::QAR(C)
    • P(g);OGATEB::QAB(C)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • R(f);OGATE,XB(H)::QAR2(C)
        • P(g);OGATEB::QAB(C)
      • Refutation
        • P(c);XP(B)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(i);::S(E)
      • Refutation
        • P(g);XQ(C)
  • Actual
    • S(F);
    • Vars
      • R(f);SBLOCK,XB(H)::S(E)
      • P(c);OGATE,XP(B)::QAR(C)
      • P(g);OGATEB,XS(F)::QAB(C)
      • R(f);N_GUARD::S(F),XR(f)
      • R(f);N_GUARD::S(F)
      • P(g);OGATEB::QAB(C)
      • S(i);N_GUARD::S(F)
      • S(i);N_GUARD::S(F),XS(i)
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